That explains why

I haven't been sleeping well really.

Waking up periodically in the middle of the night.

Now I know why:
http://sg.news.yahoo.com/cna/20081013/tap-356-more-singaporeans-expected-seek-231650b.html

I am affected!

"Those suffering from depression or anxiety will be perpetually in low moods and losing sleep, appetite and weight."

*chants* Lose weight lose weight lose weight *chants*